Appearance: Dark grey Metallic PowderApplication: Used as rhenium sample; As an additive for superalloys; Raw material for various rhenium parts.Chemical Specification: Re-4N grade â¥99.99%(subtraction method)                     Re-5N grade â¥99.999%(subtraction method,except gas r>Particle size:-200 mesh, provide laser particle size distribution test report or SEM tos as per customer's request.